Qhov Tseem Ceeb Qhov txawv - Afferent vs Efferent Arterioles
Ntshav nkag mus rau lub raum ntawm lub raum cov hlab ntsha. Cov hlab ntsha no yog branching ncaj qha los ntawm lub aorta. Lawv nkag mus rau lub raum ntawm qhov chaw ntawm hilus. Cov hlab ntsha interlobular yog thawj ceg ntawm lub raum hlab ntsha. Cov hlab ntsha arcuate uas tshwm sim los ntawm cov hlab ntsha interlobular khiav raws cortical-medullary hlws ris, thiab nws tuaj yeem pom nyob rau hauv cov kab mob hauv lub raum. Cov hlab ntsha interlobular muab cov ntshav mus rau glomeruli ntawm afferent arterioles. Cov afferent thiab efferent arterioles yog cov hlab ntsha tseem ceeb uas yog lub luag haujlwm rau kev muab cov ntshav mus rau hauv thiab tawm ntawm glomerulus ntawm lub raum. Ib qho afferent arteriole yog ib feem ntawm lub raum cov hlab ntsha uas nqa cov ntshav uas muaj nitrogenous pov tseg. Ib qho efferent arteriole yog ib feem ntawm lub raum cov hlab ntsha uas nqa cov ntshav ntshiab rov qab mus rau hauv cov hlab ntsha. Qhov sib txawv tseem ceeb ntawm afferent thiab efferent arterioles yog, afferent arterioles coj cov ntshav tsis huv mus rau glomerulus whereas cov hlab ntsha efferent tshem tawm cov ntshav lim dej ntshiab rov qab mus rau lub cev.
Afferent Arterioles yog dab tsi?
Lub raum cov hlab ntsha feem ntau tshwm sim los ntawm ib sab ntawm lub plab aorta. Thiab nws muab lub raum nrog cov ntshav. Lub raum hlab ntsha yog nyob saum lub raum cov hlab ntsha. Ib feem loj ntawm cov ntshav ntawm lub plawv tso zis tuaj yeem dhau los ntawm lub raum hlab ntsha. Cov hlab ntsha interlobular yog thawj ceg ntawm lub raum hlab ntsha. Cov hlab ntsha interlobular muab cov ntshav mus rau glomeruli ntawm afferent arterioles. Afferent arterioles yog ib pawg ntawm cov hlab ntsha uas nqa cov ntshav nrog nitrogenous pov tseg rau lub raum. Cov ntshav siab ntawm afferent arterioles yog siab. Thiab txoj kab uas hla ntawm afferent arterioles hloov raws li cov ntshav siab sib txawv ntawm tib neeg lub cev.
Daim duab 01: Cov Afferent thiab Efferent Arterioles
Cov afferent arterioles ua lub luag haujlwm tseem ceeb hauv kev tswj cov ntshav siab raws li ib feem ntawm tubuloglomerular tawm tswv yim mechanism. Tom qab ntawd, cov afferent arterioles yog diverging mus rau hauv lub capillaries ntawm lub glomerulus. Thaum txo cov ntshav siab thiab txo qis hauv sodium ion concentration, afferent arterioles raug txhawb kom zais renin los ntawm prostaglandins uas tau tso tawm los ntawm cov hlab ntsha distal macula densa hlwb. Lub renin tuaj yeem qhib lub renin-angiotensin-aldosterone system. Nyob rau hauv lem, qhov no system activates lub reabsorption ntawm sodium ions los ntawm lub glomeruli filtrate. Qhov no thaum kawg nce ntshav siab. Lub macula densa cell kuj tuaj yeem ua rau cov ntshav siab ntawm afferent arterioles los ntawm kev txo qis cov synthesis ntawm ATP. Yog tias afferent arterioles raug txwv, cov ntshav siab hauv capillaries hauv lub raum yuav poob.
Efferent Arterioles yog dab tsi?
Efferent arterioles yog cov hlab ntsha uas yog ib feem ntawm lub raum hauv lub cev. Lawv nqa cov ntshav tawm ntawm glomerulus. Lub efferent arterioles yog tsim los ntawm convergence ntawm capillaries nyob rau hauv lub glomerulus. Lawv nqa cov ntshav tawm ntawm glomerulus uas twb tau lim thiab tsis muaj nitrogenous wastages. Lawv ua lub luag haujlwm tseem ceeb hauv kev tswj hwm glomerulus pom tus nqi txawm tias cov ntshav siab hloov pauv. Cov ntshav siab ntawm cov hlab ntsha efferent tsawg dua li ntawm afferent arterioles.
Nyob rau hauv lub cortical glomeruli, cov efferent arterioles tawg mus rau hauv capillaries thiab ua ib feem ntawm cov nplua nuj plexus ntawm cov hlab ntsha nyob rau hauv lub cortical feem ntawm lub raum tubules. Tab sis nyob rau hauv lub juxtamedullary glomeruli, txawm tias lawv tawg, cov efferent arterioles tsim ib pob ntawm cov hlab ntsha (arteriole recti) uas hla sab nrauv ntawm medulla thiab perfuse mus rau sab hauv ntawm lub medulla. Nyob rau hauv lub descending arteriolae recti daim ntawv zoo-organized rete mirabile. Rete marble yog lub luag haujlwm rau kev sib cais osmotic ntawm cov medulla sab hauv uas tso cai rau cov zis hypertonic thaum muaj xwm txheej tshwm sim.
Daim duab 02: Efferent Arterioles
Cov qe ntshav liab tau hloov ntawm arteriolae recti mus rau hauv cov hlab ntsha hauv cov hlab ntsha hauv thaj tsam sab nrauv ntawm medulla thiab rov qab mus rau lub raum leeg dua. Cov arterioles efferent yog constricted mus rau ib tug ntau dua degree nyob rau hauv thiaj li yuav tswj cov ntshav siab vim muaj zog tso tawm ntawm angiotensin II. Cov txheej txheem no tswj cov glomerular filtration rate.
Dab tsi yog qhov zoo sib xws ntawm Afferent thiab Efferent Arterioles?
- ob leeg yog ib feem ntawm lub raum hlab ntsha.
- Ob leeg nyob hauv lub raum.
- Ob leeg muaj cov qe ntshav liab.
- Ob leeg ua lub luag haujlwm tseem ceeb txhawm rau tswj ntshav siab.
- Ob leeg tseem ceeb rau cov txheej txheem ultrafiltration hauv lub raum.
Qhov txawv ntawm Afferent thiab Efferent Arterioles yog dab tsi?
Afferent Arterioles vs Efferent Arterioles |
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| Ib qho afferent arteriole yog ib feem ntawm lub raum cov hlab ntsha uas nqa cov ntshav mus rau hauv glomerulus. | Ib qho efferent arteriole yog ib feem ntawm lub raum cov hlab ntsha uas nqa cov ntshav tawm ntawm lub glomerulus. |
| Nitrogen khib nyiab | |
| Cov ntshav nqa los ntawm afferent arteriole muaj nitrogen pov tseg. | Cov ntshav nqa los ntawm cov hlab ntsha efferent tsis muaj nitrogen pov tseg. |
| ntshav siab | |
| ntshav siab yog siab nyob rau hauv afferent arteriole. | ntshav siab qis hauv cov hlab ntsha efferent. |
| kab | |
| Lub afferent arteriole muaj txoj kab uas hla loj dua hauv cortical nephron. | Cov efferent arteriole muaj ib txoj kab me me hauv lub cortical nephron. |
| Lwm yam haujlwm | |
| Afferent arteriole tswj cov ntshav siab. | Efferent arteriole tswj cov glomerular pom tus nqi. |
| frees | |
| Ntshav hauv afferent arteriole muaj cov qe ntshav, qabzib, ions, amino acids thiab nitrogen pov tseg. | Ntshav hauv cov hlab ntsha efferent muaj cov qe ntshav, qabzib, ions thiab dej tsawg dua. |
Summary – Afferent vs Efferent Arterioles
Lub nephron yog lub luag haujlwm ntawm lub raum, thiab lub luag haujlwm tseem ceeb (ultrafiltration) ntawm lub raum yog nqa tawm los ntawm nephrons. Lub nephron yog tsim los ntawm lub raum corpuscle muaj capillaries hu ua glomerulus thiab encompassing qauv hu ua Bowman's capsule. Lub raum cov hlab ntsha muab cov ntshav mus rau glomerulus uas yuav tsum tau lim. Cov afferent thiab efferent arterioles yog cov hlab ntsha tseem ceeb uas tswj cov ntshav mus rau hauv thiab tawm ntawm lub raum glomerulus. Cov afferent arterioles nqa cov ntshav nrog nitrogen nkoos mus rau hauv lub glomerulus. Ntawm qhov tod tes, efferent arterioles coj cov ntshav lim tawm ntawm glomerulus. Qhov no yog qhov txawv ntawm afferent thiab efferent arterioles.
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Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Afferent thiab Efferent Arterioles
